Modelling of an infrared halogen lamp in a rapid thermal system

Infrared heating modeling of recycled PET preforms in injection stretch blow molding process

“…This is because they affect the maximum power and wavelength range associated with the elements [16]. These operating temperatures can be obtained either by experimental measurements [19,20], or by numerical calculations [21][22][23]. Considering that the temperature of the tungsten filament is very high in comparison to the temperature of the quartz tube, several previous studies made the assumption that the tungsten filament is the sole radiation source, the radiation emitted from the quartz tube is neglected [11,22,24].…”

“…These operating temperatures can be obtained either by experimental measurements [19,20], or by numerical calculations [21][22][23]. Considering that the temperature of the tungsten filament is very high in comparison to the temperature of the quartz tube, several previous studies made the assumption that the tungsten filament is the sole radiation source, the radiation emitted from the quartz tube is neglected [11,22,24]. Moreover, the authors assumed that losses due to convection and conduction within the lamps are negligible, thus the lamps converted 100% of the electrical power input to radiation [11,22].…”

Simulation of Natural Convection Heat Transfer of Nitrogen in a Cylindrical Enclosure

“…The problem of natural convection heat transfer over cylindrical or spherical enclosures is very frequent in several technological applications, such as vaporization and condensation of fuel droplets, nuclear reactor design, spray drying, solar energy collectors, and lamp technologies [1][2][3][4][5][6][7][8][9][10][11].…”

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Abstract

In this work we consider the numerical simulation of heat transfer by natural convection in a horizontal

IntroductionThe problem of natural convection heat transfer over cylindrical or spherical enclosures is very frequent in several technological applications, such as vaporization and condensation of fuel droplets, nuclear reactor design, spray drying, solar energy collectors, and lamp technologies [1][2][3][4][5][6][7][8][9][10][11].Several researchers have studied numerically and experimentally the natural convection heat transfer in spherical lamps, only limited literature is available for natural convection in cylindrical lamps [7,12,13]. Fisher and Fitzgerald [12] solved the conservation equations in two dimensions and predicted the flow patterns and tungsten transport in horizontal cylindrical lamps.

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Numerical Study on Transient Heat Transfer of a Quartz Lamp Heating System

“…RTP is essential in the manufacturing of semiconductor devices such as integrated circuits, memories, or solar cells. They correspond to key stages in wafer production operations such as annealing (RTA), oxidation (RTO), or chemical vapor deposition (RTCVD) [1][2][3]. A quartz lamp heating system is also the most used heating method for thermal testing because of its high efficiency (approximately 90%).…”